The metadata key must begin at the beginning of the line. It must start with a letter or number, then the following characters can consist of letters, numbers, spaces, hyphens, or underscore characters.
The current colorization does not handle key names containing space, hyphen or underscore.
Ex. This will not be properly highlighted (and HTML Header is a standard MultiMarkdown meta‑data key):
HTML Header: <style>
body { width:100ex; margin:auto; text-align:justify; }
/* Some more style. */
</style>
The documentation for MultiMarkdown states a key name in the meta‑data section, may contains spaces:
http://fletcher.github.io/peg-multimarkdown/index
The current colorization does not handle key names containing space, hyphen or underscore.
Ex. This will not be properly highlighted (and
HTML Headeris a standard MultiMarkdown meta‑data key):